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  • Title: Co-Occurrence of ADHD and high IQ: a case series empirical study.
    Author: Cordeiro ML, Farias AC, Cunha A, Benko CR, Farias LG, Costa MT, Martins LF, McCracken JT.
    Journal: J Atten Disord; 2011 Aug; 15(6):485-90. PubMed ID: 20576645.
    Abstract:
    OBJECTIVE: The validity of a diagnosis of ADHD in children with a high intelligence quotient (IQ) remains controversial. Using a multidisciplinary approach, rigorous diagnostic criteria, and worldwide-validated psychometric instruments, we identified a group of children attending public schools in southern Brazil for co-occurrence of high IQ and ADHD. METHOD: Students attending public schools, in the first to fifth grades, were referred to our Research Center for behavioral and/or learning difficulties. These children completed clinical, psychiatric, psychological, and pedagogical evaluations for assessment of IQ, ADHD, learning, and other emotional or behavioral disorders. RESULTS: Fifteen of the participants were identified to have a full-scale IQ ≥ 120. Data show that 10 of these high-IQ children met the DSM-IV criteria diagnosis for ADHD combined type, 5 met criteria for current oppositional-defiant disorder, 2 had current major depression, and 2 had a learning disorder. Here we present the results as a case series. CONCLUSION: Our data support the hypothesis that ADHD is a valid diagnosis in children with high IQs.
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